EP2406029B1 - Zerspanungswerkzeug für eine werkzeugmaschine - Google Patents

Zerspanungswerkzeug für eine werkzeugmaschine Download PDF

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Publication number
EP2406029B1
EP2406029B1 EP10711837A EP10711837A EP2406029B1 EP 2406029 B1 EP2406029 B1 EP 2406029B1 EP 10711837 A EP10711837 A EP 10711837A EP 10711837 A EP10711837 A EP 10711837A EP 2406029 B1 EP2406029 B1 EP 2406029B1
Authority
EP
European Patent Office
Prior art keywords
cutting
receptacle
coolant
cutting head
coupling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP10711837A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2406029A1 (de
Inventor
Michael Schuffenhauer
Bernhard Eckl
Xaver Spichtinger
Armin Zimmermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kennametal Inc
Original Assignee
Kennametal Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kennametal Inc filed Critical Kennametal Inc
Publication of EP2406029A1 publication Critical patent/EP2406029A1/de
Application granted granted Critical
Publication of EP2406029B1 publication Critical patent/EP2406029B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/02—Milling-cutters characterised by the shape of the cutter
    • B23C5/10—Shank-type cutters, i.e. with an integral shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/11—Retention by threaded connection
    • B23B31/1107—Retention by threaded connection for conical parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/11—Retention by threaded connection
    • B23B31/1107—Retention by threaded connection for conical parts
    • B23B31/1122—Retention by threaded connection for conical parts using cylindrical threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/0002—Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position
    • B23B51/0003—Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position with exchangeable heads or inserts
    • B23B51/0004—Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position with exchangeable heads or inserts with cutting heads or inserts attached by screw means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/06—Drills with lubricating or cooling equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/06—Drills with lubricating or cooling equipment
    • B23B51/068—Details of the lubricating or cooling channel
    • B23B51/0682—Coolant moves along outside of tool periphery toward cutting edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D77/00—Reaming tools
    • B23D77/006—Reaming tools with means for lubricating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/24—Cooling or lubrication means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2250/00—Compensating adverse effects during turning, boring or drilling
    • B23B2250/12—Cooling and lubrication
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2250/00—Compensating adverse effects during turning, boring or drilling
    • B23B2250/12—Cooling and lubrication
    • B23B2250/121—Insert with coolant channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/02—Connections between shanks and removable cutting heads
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/14—Cutters, for shaping with means to apply fluid to cutting tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/44—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product
    • Y10T408/45—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product including Tool with duct
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/44—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product
    • Y10T408/45—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product including Tool with duct
    • Y10T408/455—Conducting channel extending to end of Tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/909—Having peripherally spaced cutting edges
    • Y10T408/9098—Having peripherally spaced cutting edges with means to retain Tool to support

Definitions

  • the invention relates to a modular cutting tool for a machine tool according to the preamble of claim 1, such Zerschreibswerkmaschine is from the DE 10 2006 028373 A1 known.
  • This tool consists of a cutting head, a shaft and an effective between the shaft and cutting head coupling. With the help of the shaft, the tool is clamped in the tool holder, for example the chuck of a machine tool.
  • the cutting head is releasably fixed to the shaft.
  • the cutting head can be designed depending on the desired application as a drill head, milling head or reaming head. It can also be a cutting head for any other machining process.
  • a cutting tool with a coolant guide consisting of a central coolant channel or coolant tube and a plurality of coolant channels.
  • the coolant channels are designed as fitting bores or axial grooves in the end region of the shaft or a functional insert introduced into the shaft at the end.
  • the disadvantage is the large number of cooling channels to the concomitant weakening of the flexural rigidity of the shaft in the shank end region.
  • a clamping cone is used as a coupling between the cutting head and shaft.
  • the active surfaces are very small here because of the conical shape of the clamping cone.
  • the clamping surfaces ie the conical surfaces of the clamping cone on the cutting head and the corresponding mating surfaces are arranged very deep in the shaft. The surfaces are not visible when inserting the cutting head from the outside. It is therefore possible that the surfaces tilt when inserting the cutting head into the shaft. This danger of tilting can be reduced by attaching indicators to the tool. However, this attachment is very expensive.
  • the coupling is designed here as a screw with a differential thread.
  • the screw has for this purpose two threads of different pitch.
  • One of the threads is designed as a left-hand thread and the other as a right-hand thread.
  • the fine thread is screwed into the respective thread carrier.
  • the normal or coarse thread is screwed into the other thread carrier, whereby both coupling members, ie cutting head and shaft, are effectively braced against each other.
  • the invention is - based on the prior art - the task of simplifying the cutting tool constructive.
  • the cutting head on its cutting head back wall on a coupling pin.
  • This coupling pin lies with the clutch engaged in a receptacle in the shaft.
  • a central coolant channel is initially provided in the shaft.
  • This central channel branches in the area of recording on two sub-channels. These sub-ducts are guided to the end-face planar contact of the shaft and open there from the shaft. In this way, the two sub-channels flank the recording. Due to the introduction of only two sub-channels in the shaft its stability in the recording is not significantly weakened.
  • the coupling which is arranged in the receptacle in the shaft, is kept completely free of coolant and lubricant, so that corrosion, contamination or the like can not occur here.
  • annular distributor groove For distributing the coolant and for supplying the coolant to the cutting edges on the cutting head, an annular distributor groove is first formed in a flat collar on the cutting head rear wall.
  • This distributor groove can be introduced into the plan collar by machining and is consequently simple in terms of manufacturing technology and therefore inexpensive to produce.
  • the distributor groove in turn has one or more coolant bores. These coolant holes supply the blades with the coolant via small coolant channels connected to them.
  • the number of coolant holes corresponds to the number of associated with them cutting.
  • each blade is a separate coolant hole with a connected and to the cutting edge assigned extending coolant channel. In this way it is easily possible to supply each cutting edge with coolant.
  • the distribution groove distributes the coolant from only two sub-channels to any number of cutting edges, a wide variety of cutting heads can be coupled to the same number of cutting edges with one and the same shaft. With the invention, it is thus possible, regardless of the number of coolant supply channels in the shaft different coupling heads with completely different numbers of cutting and coolant holes to couple.
  • the coolant holes in the distributor groove associated coolant channels on the cutter head front side it is also possible to let open the coolant holes in the distributor groove associated coolant channels on the cutter head front side.
  • This embodiment is used for machining, for example, for the friction machining of blind holes.
  • the coolant is sprayed on the bottom of the hole as it were and reflected from there to the cutting edges.
  • the cutting edges are thus indirectly supplied with coolant in this way.
  • the inventive coolant supply is thus suitable not only for tools that push the chips in front of him, but also for tools that lead out the chip material grooves on the circumference of the bore.
  • crescent-shaped recesses are provided on the opening wheel of the receptacle, on the one hand to promote the inflow of the coolant into the distributor groove and on the other hand to ensure that the plan system also after the rework both the shank side plan system as well as after reworking the cutting head side plan Federal on the Flat collar lies flush. In other words, it is to be prevented that non-reworkable areas of the flat bundle prevent a flat resting of the plan system on the plan bundle.
  • the cutting head on its cutting head back wall on a coupling pin.
  • This coupling pin lies with the clutch engaged in a receptacle in the shaft.
  • a contact surface extending from the opening edge into the receptacle is formed as part of a form-locking coupling.
  • a counter-contact surface is formed on the outer jacket of the coupling pin.
  • the contact surface is arranged in the region of the opening edge of the receptacle on the shaft, it is clearly visible from the outside, which favors the displacement of the contact surface and counter-contact surface during threading of the coupling pin in the receptacle and thus a simple and accurate installation of the cutting head on the shaft.
  • the counter-bearing surfaces can be easily machined on the coupling pin.
  • the cutting tool according to the invention it is firstly possible to securely couple the cutting head to the shaft, because the contact surfaces and counter-bearing surfaces are arranged in a clearly visible manner. On the other hand, it is possible for the invention to transfer particularly high torques between the cutting head and the shaft.
  • a screw with two external threads same direction and different pitch serves as a coupling. It is a screw insert with a so-called differential thread.
  • a fine thread between the cutting head and screw insert is used, while between shaft and screw a standard thread or coarse thread can be used.
  • the use of co-rotating threads during clamping of the tool, so when clamping the cutting head in the shaft has the advantage that both pitches subtract as it were, because the fine thread partially unscrews when screwing in the coarse thread.
  • a much smaller torque is required for clamping the cutting head in relation to the shaft.
  • right-hand threads also has the advantage that in the shaft, a conventional cutting head can be stretched, which carries the usual right-hand thread on its tail rear wall.
  • the shanks can then be used not only for clamping the cutting head with the aid of a threaded insert with differential thread, but also for clamping cutting heads with commercially available right-hand threads.
  • the inventive cutting tool is composed of a cutting head 1 and a shaft 2 coupled to the cutting head 1.
  • the shaft 2 has a tool clamping surface 3. With the tool clamping surface 3 of the shaft 2 is clamped in a not shown in the figures tool chuck a machine tool.
  • the shaft 2 further comprises a clamping screw 4 for closing the clutch.
  • the shaft 2 has an approximately hollow cylindrical receptacle 5 for the coupling pin 6 of the cutting head 1.
  • the coupling pin 6 protrudes from the cutting head rear wall 7 of the cutting head 1 addition.
  • a plane surface 9 At the opening edge 8 of the receptacle 5 can be seen in Fig. 1 a plane surface 9.
  • the flat surfaces 9 are configured on the shaft 2 in pairs opposite each other. This is in Fig. 3 recognizable.
  • the opening edge 8 of the receptacle 5 is surrounded by the annular planar system 10.
  • the planar system 10 is in each case interrupted by the mutually opposite outlets 11 of the partial channels 12. From the outlets 11, the coolant flows in the direction indicated by the thick arrows Coolant flow direction 13 in the direction of the individual cutting edges 14 on the cutting head. 1
  • the coolant flows in the coolant flow direction 13 from the orifices 11 into the distributor groove 15 molded into the cutting body rear wall 7.
  • the distributor groove 15 is simply inserted into a flat shoulder 16 formed on the cutting head rear wall 7.
  • the plan collar 16 surrounds the centrally projecting from the cutting head rear wall 7 coupling pin 6 like a wreath.
  • the region of the coupling pin 6 adjacent to the flat collar 16 is configured as the circumferential ring 17 enlarging the diameter of the coupling pin 6.
  • the flat surfaces 18 of the cutting head 1 thus form the counter-bearing surfaces for the likewise formed as a flat surface 9 contact surfaces in the shaft 2. This is in Fig. 8 recognizable.
  • Fig. 8 Also recognizable is the pairwise opposite arrangement of both the flat surfaces 9 on the shaft 2 and the flat surfaces 18 on the cutting head. 1
  • the number of coolant bores 19 corresponds to that in FIG Fig. 4 and Fig. 5 illustrated embodiment, the number of cutting edges 14. Each cutting edge 14 is thus associated with a coolant hole 19.
  • the coolant bore 19 is flowed through in the coolant flow direction 13 by the coolant.
  • the coolant holes 19 are connected by small coolant channels with the blades 14 and thus promote the coolant to the cutting edges 14. Coolant exits the shaft from the two opposite outlets 11 in the coolant flow direction 13 and runs into the distributor groove 15 and leaves the distributor groove 15 again in the coolant flow direction 13 through the coolant holes 19 in the direction of the cutting edges 14.
  • the shaft 2 is penetrated in the central longitudinal direction of an initially central coolant passage 20.
  • the coolant channel 20 branches in the region of the receptacle 5 - what in Fig. 9 is clearly visible - in two sub-channels 12.
  • the sub-channels 12 flank the receptacle 5 and open into the orifices 11 in the region of Planstrom 10.
  • the coolant thus flows first through the central coolant passage 20 and in turn is divided into two partial streams, which respectively flow through the sub-channels 12 and terminates in the outlets 11 on the faceplate 10 from.
  • Fig. 7 recognizable is the cutting head back wall 7 facing away from the cutting head end wall 27.
  • the cutting head end wall 27 in Fig. 7 has a coolant outlet 28.
  • the coolant is in the embodiment according to Fig. 7 So not promoted to the individual cutting 14, but occurs on the coolant outlet 28.
  • This embodiment is suitable for processing blind holes. The coolant thus splashes first against the bottom of the blind bore and is reflected from there to the cutting 14 out.
  • Fig. 13 again shows the shaft 2 and the cutting head 1.
  • the cutting head 1 in turn carries on its cutting head rear wall 7 a coupling pin 6.
  • the coupling pin 6 in Fig. 13 is hollow cylinder except and carries a designed as a right-hand thread.
  • the fine thread 21 of the screw 22 is screwed.
  • the coarse thread 23 which is also configured as a right-hand thread, the screw 22 is screwed into an internal thread in the receptacle 5 of the shaft 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Milling Processes (AREA)
  • Drilling Tools (AREA)
  • Milling, Broaching, Filing, Reaming, And Others (AREA)
EP10711837A 2009-03-10 2010-03-10 Zerspanungswerkzeug für eine werkzeugmaschine Active EP2406029B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009012433A DE102009012433A1 (de) 2009-03-10 2009-03-10 Zerspanungswerkzeug für eine Werkzeugmaschine
PCT/EP2010/001478 WO2010102793A1 (de) 2009-03-10 2010-03-10 Zerspanungswerkzeug für eine werkzeugmaschine

Publications (2)

Publication Number Publication Date
EP2406029A1 EP2406029A1 (de) 2012-01-18
EP2406029B1 true EP2406029B1 (de) 2012-11-21

Family

ID=42224255

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10711837A Active EP2406029B1 (de) 2009-03-10 2010-03-10 Zerspanungswerkzeug für eine werkzeugmaschine

Country Status (8)

Country Link
US (1) US8764354B2 (zh)
EP (1) EP2406029B1 (zh)
JP (1) JP2012520180A (zh)
KR (1) KR20110136834A (zh)
CN (1) CN102378662B (zh)
BR (1) BRPI1013213A2 (zh)
DE (1) DE102009012433A1 (zh)
WO (1) WO2010102793A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8764354B2 (en) 2009-03-10 2014-07-01 Kennametal Inc. Cutting tool for a machine tool

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US20120121344A1 (en) 2012-05-17
CN102378662B (zh) 2013-09-04
DE102009012433A1 (de) 2010-09-16
EP2406029A1 (de) 2012-01-18
WO2010102793A1 (de) 2010-09-16
JP2012520180A (ja) 2012-09-06
KR20110136834A (ko) 2011-12-21
US8764354B2 (en) 2014-07-01
CN102378662A (zh) 2012-03-14
BRPI1013213A2 (pt) 2016-03-29

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